[ViewVC] Diff of: cvs/Convert-BER-XS/XS.pm

Comparing Convert-BER-XS/XS.pm (file contents):
Revision 1.9 by root, Fri Apr 19 20:43:12 2019 UTC vs.
Revision 1.23 by root, Sat Apr 20 14:53:29 2019 UTC

…		…
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use Convert::BER::XS ':all';	7	use Convert::BER::XS ':all';
8		8
9	my $ber = ber_decode $buf	9	my $ber = ber_decode $buf, $Convert::BER::XS::SNMP_PROFILE
10	or die "unable to decode SNMP message";	10	or die "unable to decode SNMP message";
11		11
12	# The above results in a data structure consisting of (class, tag,	12	# The above results in a data structure consisting of
		13	# (class, tag, # constructed, data)
13	# constructed, data) tuples. Below is such a message, SNMPv1 trap	14	# tuples. Below is such a message, SNMPv1 trap
14	# with a Cisco mac change notification.	15	# with a Cisco mac change notification.
15	# Did you know that Cisco is in the news almost every week because	16	# Did you know that Cisco is in the news almost
		17	# every week because of some backdoor password
16	# of some backdoor password or other extremely stupid security bug?	18	# or other extremely stupid security bug?
17		19
18	[ ASN_UNIVERSAL, ASN_SEQUENCE, 1,	20	[ ASN_UNIVERSAL, ASN_SEQUENCE, 1,
19	[	21	[
20	[ ASN_UNIVERSAL, ASN_INTEGER32, 0, 0 ], # snmp version 1	22	[ ASN_UNIVERSAL, ASN_INTEGER32, 0, 0 ], # snmp version 1
21	[ ASN_UNIVERSAL, 4, 0, "public" ], # community	23	[ ASN_UNIVERSAL, 4, 0, "public" ], # community
22	[ ASN_CONTEXT, 4, 1, # CHOICE, constructed - trap PDU	24	[ ASN_CONTEXT, 4, 1, # CHOICE, constructed - trap PDU
23	[	25	[
24	[ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.2" ], # enterprise oid	26	[ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.2" ], # enterprise oid
25	[ ASN_APPLICATION, 0, 0, "\x0a\x00\x00\x01" ], # SNMP IpAddress, 10.0.0.1	27	[ ASN_APPLICATION, SNMP_IPADDRESS, 0, "10.0.0.1" ], # SNMP IpAddress
26	[ ASN_UNIVERSAL, ASN_INTEGER32, 0, 6 ], # generic trap	28	[ ASN_UNIVERSAL, ASN_INTEGER32, 0, 6 ], # generic trap
27	[ ASN_UNIVERSAL, ASN_INTEGER32, 0, 1 ], # specific trap	29	[ ASN_UNIVERSAL, ASN_INTEGER32, 0, 1 ], # specific trap
28	[ ASN_APPLICATION, ASN_TIMETICKS, 0, 1817903850 ], # SNMP TimeTicks	30	[ ASN_APPLICATION, SNMP_TIMETICKS, 0, 1817903850 ], # SNMP TimeTicks
29	[ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # the varbindlist	31	[ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # the varbindlist
30	[	32	[
31	[ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # a single varbind, "key value" pair	33	[ ASN_UNIVERSAL, ASN_SEQUENCE, 1, # a single varbind, "key value" pair
32	[	34	[
33	[ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.1.1.8.1.2.1" ],	35	[ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, 0, "1.3.6.1.4.1.9.9.215.1.1.8.1.2.1" ],
…		…
60	) {	62	) {
61	... and so on	63	... and so on
62		64
63	# finally, let's encode it again and hope it results in the same bit pattern	65	# finally, let's encode it again and hope it results in the same bit pattern
64		66
65	my $buf = ber_encode $ber;	67	my $buf = ber_encode $ber, $Convert::BER::XS::SNMP_PROFILE;
66		68
67	=head1 DESCRIPTION	69	=head1 DESCRIPTION
68		70
69	WARNING: Before release 1.0, the API is not considered stable in any way.	71	WARNING: Before release 1.0, the API is not considered stable in any way.
70		72
71	This module implements a I<very> low level BER/DER en-/decoder.	73	This module implements a I<very> low level BER/DER en-/decoder.
72		74
73	If is tuned for low memory and high speed, while still maintaining some	75	It is tuned for low memory and high speed, while still maintaining some
74	level of user-friendlyness.	76	level of user-friendlyness.
75		77
76	Currently, not much is documented, as this is an initial release to	78	=head2 EXPORT TAGS AND CONSTANTS
77	reserve CPAN namespace, stay tuned for a few days.	79
		80	By default this module doesn't export any symbols, but if you don't want
		81	to break your keyboard, editor or eyesight with extremely long names, I
		82	recommend importing the C<:all> tag. Still, you can selectively import
		83	things.
		84
		85	=over
		86
		87	=item C<:all>
		88
		89	All of the below. Really. Recommended for at least first steps, or if you
		90	don't care about a few kilobytes of wasted memory (and namespace).
		91
		92	=item C<:const>
		93
		94	All of the strictly ASN.1-related constants defined by this module, the
		95	same as C<:const_asn :const_index>. Notably, this does not contain
		96	C<:const_ber_type> and C<:const_snmp>.
		97
		98	A good set to get everything you need to decode and match BER data would be
		99	C<:decode :const>.
		100
		101	=item C<:const_index>
		102
		103	The BER tuple array index constants:
		104
		105	BER_CLASS BER_TAG BER_CONSTRUCTED BER_DATA
		106
		107	=item C<:const_asn>
		108
		109	ASN class values (these are C<0>, C<1>, C<2> and C<3>, respectively -
		110	exactly thw two topmost bits from the identifier octet shifted 6 bits to
		111	the right):
		112
		113	ASN_UNIVERSAL ASN_APPLICATION ASN_CONTEXT ASN_PRIVATE
		114
		115	ASN tag values (some of which are aliases, such as C<ASN_OID>). Their
		116	numerical value corresponds exactly to the numbers used in BER/X.690.
		117
		118	ASN_BOOLEAN ASN_INTEGER32 ASN_BIT_STRING ASN_OCTET_STRING ASN_NULL ASN_OBJECT_IDENTIFIER
		119	ASN_OBJECT_DESCRIPTOR ASN_OID ASN_EXTERNAL ASN_REAL ASN_SEQUENCE ASN_ENUMERATED
		120	ASN_EMBEDDED_PDV ASN_UTF8_STRING ASN_RELATIVE_OID ASN_SET ASN_NUMERIC_STRING
		121	ASN_PRINTABLE_STRING ASN_TELETEX_STRING ASN_T61_STRING ASN_VIDEOTEX_STRING ASN_IA5_STRING
		122	ASN_ASCII_STRING ASN_UTC_TIME ASN_GENERALIZED_TIME ASN_GRAPHIC_STRING ASN_VISIBLE_STRING
		123	ASN_ISO646_STRING ASN_GENERAL_STRING ASN_UNIVERSAL_STRING ASN_CHARACTER_STRING ASN_BMP_STRING
		124
		125	=item C<:const_ber_type>
		126
		127	The BER type constants, explained in the PROFILES section.
		128
		129	BER_TYPE_BYTES BER_TYPE_UTF8 BER_TYPE_UCS2 BER_TYPE_UCS4 BER_TYPE_INT
		130	BER_TYPE_OID BER_TYPE_RELOID BER_TYPE_NULL BER_TYPE_BOOL BER_TYPE_REAL
		131	BER_TYPE_IPADDRESS BER_TYPE_CROAK
		132
		133	=item C<:const_snmp>
		134
		135	Constants only relevant to SNMP. These are the tag values used by SNMP in
		136	the C<ASN_APPLICATION> namespace and have the exact numerical value as in
		137	BER/RFC 2578.
		138
		139	SNMP_IPADDRESS SNMP_COUNTER32 SNMP_UNSIGNED32 SNMP_TIMETICKS SNMP_OPAQUE SNMP_COUNTER64
		140
		141	=item C<:decode>
		142
		143	C<ber_decode> and the match helper functions:
		144
		145	ber_decode ber_is ber_is_seq ber_is_i32 ber_is_oid
		146
		147	=item C<:encode>
		148
		149	C<ber_encode> and the construction helper functions:
		150
		151	ber_encode ber_i32
		152
		153	=back
78		154
79	=head2 ASN.1/BER/DER/... BASICS	155	=head2 ASN.1/BER/DER/... BASICS
80		156
81	ASN.1 is a strange language that can be sed to describe protocols and	157	ASN.1 is a strange language that can be used to describe protocols and
82	data structures. It supports various mappings to JSON, XML, but most	158	data structures. It supports various mappings to JSON, XML, but most
83	importantly, to a various binary encodings such as BER, that is the topic	159	importantly, to a various binary encodings such as BER, that is the topic
84	of this module, and is used in SNMP or LDAP for example.	160	of this module, and is used in SNMP or LDAP for example.
85		161
86	While ASN.1 defines a schema that is useful to interpret encoded data,	162	While ASN.1 defines a schema that is useful to interpret encoded data,
87	the BER encoding is actually somehat self-describing: you might not know	163	the BER encoding is actually somewhat self-describing: you might not know
88	whether something is a string or a number or a sequence or something else,	164	whether something is a string or a number or a sequence or something else,
89	but you can nevertheless decode the overall structure, even if you end up	165	but you can nevertheless decode the overall structure, even if you end up
90	with just a binary blob for the actual value.	166	with just a binary blob for the actual value.
91		167
92	This works because BER values are tagged with a type and a namespace,	168	This works because BER values are tagged with a type and a namespace,
93	and also have a flag that says whther a value consists of subvalues (is	169	and also have a flag that says whether a value consists of subvalues (is
94	"constructed") or not (is "primitive").	170	"constructed") or not (is "primitive").
95		171
96	Tags are simple integers, and ASN.1 defines a somewhat weird assortment of	172	Tags are simple integers, and ASN.1 defines a somewhat weird assortment of
97	those - for example, you have 32 bit signed integers and 16(!) different	173	those - for example, you have 32 bit signed integers and 16(!) different
98	string types, but there is no unsigned32 type for example. Different	174	string types, but there is no Unsigned32 type for example. Different
99	applications work around this in different ways, for example, SNMP defines	175	applications work around this in different ways, for example, SNMP defines
100	application-specific Gauge32, Counter32 and Unsigned32, which are mapped	176	application-specific Gauge32, Counter32 and Unsigned32, which are mapped
101	to two different tags: you can distinguish between Counter32 and the	177	to two different tags: you can distinguish between Counter32 and the
102	others, but not between Gause32 and Unsigned32, without the ASN.1 schema.	178	others, but not between Gause32 and Unsigned32, without the ASN.1 schema.
103		179
…		…
108	This module represents every BER value as a 4-element tuple (actually an	184	This module represents every BER value as a 4-element tuple (actually an
109	array-reference):	185	array-reference):
110		186
111	[CLASS, TAG, CONSTRUCTED, DATA]	187	[CLASS, TAG, CONSTRUCTED, DATA]
112		188
		189	For example:
		190
		191	[ASN_UNIVERSAL, ASN_INTEGER32, 0, 177] # the integer 177
		192	[ASN_UNIVERSAL, ASN_OCTET_STRING, 0, "john"] # the string "john"
		193	[ASN_UNIVERSAL, ASN_OID, 0, "1.3.6.133"] # some OID
		194	[ASN_UNIVERSAL, ASN_SEQUENCE, 1, [ [ASN_UNIVERSAL... # a sequencE
		195
113	To avoid non-descriptive hardcoded array index numbers, this module	196	To avoid non-descriptive hardcoded array index numbers, this module
114	defines symbolic constants to access these members: C<BER_CLASS>,	197	defines symbolic constants to access these members: C<BER_CLASS>,
115	C<BER_TAG>, C<BER_CONSTRUCTED> and C<BER_DATA>.	198	C<BER_TAG>, C<BER_CONSTRUCTED> and C<BER_DATA>.
116		199
117	Also, the first three members are integers with a little caveat: for	200	Also, the first three members are integers with a little caveat: for
…		…
120	I<DATA> member, and you may re-assign the array itself, e.g.:	203	I<DATA> member, and you may re-assign the array itself, e.g.:
121		204
122	$ber = ber_decode $binbuf;	205	$ber = ber_decode $binbuf;
123		206
124	# the following is NOT legal:	207	# the following is NOT legal:
125	$ber->[BER_CLASS] = ASN_PRIVATE; # ERROR, class/tag/constructed are readonly(!)	208	$ber->[BER_CLASS] = ASN_PRIVATE; # ERROR, CLASS/TAG/CONSTRUCTED are READ ONLY(!)
126		209
127	# but all of the following are fine:	210	# but all of the following are fine:
128	$ber->[BER_DATA] = "string";	211	$ber->[BER_DATA] = "string";
129	$ber->[BER_DATA] = [ASN_UNIVERSAL, ASN_INTEGER32, 0, 123];	212	$ber->[BER_DATA] = [ASN_UNIVERSAL, ASN_INTEGER32, 0, 123];
130	@$ber = (ASN_APPLICATION, SNMP_TIMETICKS, 1000);	213	@$ber = (ASN_APPLICATION, SNMP_TIMETICKS, 0, 1000);
131		214
132	I<CLASS> is something like a namespace for I<TAG>s - there is the	215	I<CLASS> is something like a namespace for I<TAG>s - there is the
133	C<ASN_UNIVERSAL> namespace which defines tags common to all ASN.1	216	C<ASN_UNIVERSAL> namespace which defines tags common to all ASN.1
134	implementations, the C<ASN_APPLICATION> namespace which defines tags for	217	implementations, the C<ASN_APPLICATION> namespace which defines tags for
135	specific applications (for example, the SNMP C<Unsigned32> type is in this	218	specific applications (for example, the SNMP C<Unsigned32> type is in this
…		…
249	true.	332	true.
250		333
251	=item $bool = ber_is_oid $tuple, $oid_string	334	=item $bool = ber_is_oid $tuple, $oid_string
252		335
253	Returns true if the C<$tuple> represents an ASN_OBJECT_IDENTIFIER	336	Returns true if the C<$tuple> represents an ASN_OBJECT_IDENTIFIER
254	that exactly matches C$oid_string>. Exmaple:	337	that exactly matches C<$oid_string>. Example:
255		338
256	ber_is_oid $tuple, "1.3.6.1.4"	339	ber_is_oid $tuple, "1.3.6.1.4"
257	or die "oid must be 1.3.6.1.4";	340	or die "oid must be 1.3.6.1.4";
258		341
259	=item $oid = ber_is_oid $tuple	342	=item $oid = ber_is_oid $tuple
…		…
287	use common::sense;	370	use common::sense;
288		371
289	use XSLoader ();	372	use XSLoader ();
290	use Exporter qw(import);	373	use Exporter qw(import);
291		374
292	our $VERSION = 0.2;	375	our $VERSION;
293		376
		377	BEGIN {
		378	$VERSION = 0.8;
294	XSLoader::load __PACKAGE__, $VERSION;	379	XSLoader::load __PACKAGE__, $VERSION;
		380	}
295		381
296	our %EXPORT_TAGS = (	382	our %EXPORT_TAGS = (
297	const => [qw(	383	const_index => [qw(
298	BER_CLASS BER_TAG BER_CONSTRUCTED BER_DATA	384	BER_CLASS BER_TAG BER_CONSTRUCTED BER_DATA
299		385	)],
		386	const_asn => [qw(
300	ASN_BOOLEAN ASN_INTEGER32 ASN_BIT_STRING ASN_OCTET_STRING ASN_NULL ASN_OBJECT_IDENTIFIER ASN_TAG_BER ASN_TAG_MASK	387	ASN_BOOLEAN ASN_INTEGER32 ASN_BIT_STRING ASN_OCTET_STRING ASN_NULL ASN_OBJECT_IDENTIFIER
301	ASN_CONSTRUCTED ASN_UNIVERSAL ASN_APPLICATION ASN_CONTEXT ASN_PRIVATE ASN_CLASS_MASK ASN_CLASS_SHIFT	388	ASN_OBJECT_DESCRIPTOR ASN_OID ASN_EXTERNAL ASN_REAL ASN_SEQUENCE ASN_ENUMERATED
302	ASN_SEQUENCE	389	ASN_EMBEDDED_PDV ASN_UTF8_STRING ASN_RELATIVE_OID ASN_SET ASN_NUMERIC_STRING
303		390	ASN_PRINTABLE_STRING ASN_TELETEX_STRING ASN_T61_STRING ASN_VIDEOTEX_STRING ASN_IA5_STRING
		391	ASN_ASCII_STRING ASN_UTC_TIME ASN_GENERALIZED_TIME ASN_GRAPHIC_STRING ASN_VISIBLE_STRING
		392	ASN_ISO646_STRING ASN_GENERAL_STRING ASN_UNIVERSAL_STRING ASN_CHARACTER_STRING ASN_BMP_STRING
		393
		394	ASN_UNIVERSAL ASN_APPLICATION ASN_CONTEXT ASN_PRIVATE
		395	)],
		396	const_ber_type => [qw(
		397	BER_TYPE_BYTES BER_TYPE_UTF8 BER_TYPE_UCS2 BER_TYPE_UCS4 BER_TYPE_INT
		398	BER_TYPE_OID BER_TYPE_RELOID BER_TYPE_NULL BER_TYPE_BOOL BER_TYPE_REAL
		399	BER_TYPE_IPADDRESS BER_TYPE_CROAK
		400	)],
		401	const_snmp => [qw(
304	SNMP_IPADDRESS SNMP_COUNTER32 SNMP_UNSIGNED32 SNMP_TIMETICKS SNMP_OPAQUE SNMP_COUNTER64	402	SNMP_IPADDRESS SNMP_COUNTER32 SNMP_UNSIGNED32 SNMP_TIMETICKS SNMP_OPAQUE SNMP_COUNTER64
305	)],	403	)],
306	encode => [qw(	404	decode => [qw(
307	ber_decode	405	ber_decode
308	ber_is ber_is_seq ber_is_i32 ber_is_oid	406	ber_is ber_is_seq ber_is_i32 ber_is_oid
309	)],	407	)],
310	decode => [qw(	408	encode => [qw(
311	ber_encode	409	ber_encode
		410	ber_i32
312	)],	411	)],
313	);	412	);
314		413
315	our @EXPORT_OK = map @$_, values %EXPORT_TAGS;	414	our @EXPORT_OK = map @$_, values %EXPORT_TAGS;
316		415
317	$EXPORT_TAGS{all} = \@EXPORT_OK;	416	$EXPORT_TAGS{all} = \@EXPORT_OK;
		417	$EXPORT_TAGS{const} = [map @{ $EXPORT_TAGS{$_} }, qw(const_index const_asn)];
		418	use Data::Dump; ddx \%EXPORT_TAGS;
		419
		420	=head1 PROFILES
		421
		422	While any BER data can be correctly encoded and decoded out of the box, it
		423	can be inconvenient to have to manually decode some values into a "better"
		424	format: for instance, SNMP TimeTicks values are decoded into the raw octet
		425	strings of their BER representation, which is quite hard to decode. With
		426	profiles, you can change which class/tag combinations map to which decoder
		427	function inside C<ber_decode> (and of course also which encoder functions
		428	are used in C<ber_encode>).
		429
		430	This works by mapping specific class/tag combinations to an internal "ber
		431	type".
		432
		433	The default profile supports the standard ASN.1 types, but no
		434	application-specific ones. This means that class/tag combinations not in
		435	the base set of ASN.1 are decoded into their raw octet strings.
		436
		437	C<Convert::BER::XS> defines two profile variables you can use out of the box:
		438
		439	=over
		440
		441	=item C<$Convert::BER::XS::DEFAULT_PROFILE>
		442
		443	This is the default profile, i.e. the profile that is used when no
		444	profile is specified for de-/encoding.
		445
		446	You can modify it, but remember that this modifies the defaults for all
		447	callers that rely on the default profile.
		448
		449	=item C<$Convert::BER::XS::SNMP_PROFILE>
		450
		451	A profile with mappings for SNMP-specific application tags added. This is
		452	useful when de-/encoding SNMP data.
		453
		454	Example:
		455
		456	$ber = ber_decode $data, $Convert::BER::XS::SNMP_PROFILE;
		457
		458	=back
		459
		460	=head2 The Convert::BER::XS::Profile class
		461
		462	=over
		463
		464	=item $profile = new Convert::BER::XS::Profile
		465
		466	Create a new profile. The profile will be identical to the default
		467	profile.
		468
		469	=item $profile->set ($class, $tag, $type)
		470
		471	Sets the mapping for the given C<$class>/C<$tag> combination to C<$type>,
		472	which must be one of the C<BER_TYPE_*> constants.
		473
		474	Note that currently, the mapping is stored in a flat array, so large
		475	values of C<$tag> will consume large amounts of memory.
		476
		477	Example:
		478
		479	$profile = new Convert::BER::XS::Profile;
		480	$profile->set (ASN_APPLICATION, SNMP_COUNTER32, BER_TYPE_INT);
		481	$ber = ber_decode $data, $profile;
		482
		483	=item $type = $profile->get ($class, $tag)
		484
		485	Returns the BER type mapped to the given C<$class>/C<$tag> combination.
		486
		487	=back
		488
		489	=head2 BER TYPES
		490
		491	This lists the predefined BER types - you can map any C<CLASS>/C<TAG>
		492	combination to any C<BER_TYPE_*>.
		493
		494	=over
		495
		496	=item C<BER_TYPE_BYTES>
		497
		498	The raw octets of the value. This is the default type for unknown tags and
		499	de-/encodes the value as if it were an octet string, i.e. by copying the
		500	raw bytes.
		501
		502	=item C<BER_TYPE_UTF8>
		503
		504	Like C<BER_TYPE_BYTES>, but decodes the value as if it were a UTF-8 string
		505	(without validation!) and encodes a perl unicode string into a UTF-8 BER
		506	string.
		507
		508	=item C<BER_TYPE_UCS2>
		509
		510	Similar to C<BER_TYPE_UTF8>, but treats the BER value as UCS-2 encoded
		511	string.
		512
		513	=item C<BER_TYPE_UCS4>
		514
		515	Similar to C<BER_TYPE_UTF8>, but treats the BER value as UCS-4 encoded
		516	string.
		517
		518	=item C<BER_TYPE_INT>
		519
		520	Encodes and decodes a BER integer value to a perl integer scalar. This
		521	should correctly handle 64 bit signed and unsigned values.
		522
		523	=item C<BER_TYPE_OID>
		524
		525	Encodes and decodes an OBJECT IDENTIFIER into dotted form without leading
		526	dot, e.g. C<1.3.6.1.213>.
		527
		528	=item C<BER_TYPE_RELOID>
		529
		530	Same as C<BER_TYPE_OID> but uses relative object identifier
		531	encoding: ASN.1 has this hack of encoding the first two OID components
		532	into a single integer in a weird attempt to save an insignificant amount
		533	of space in an otherwise wasteful encoding, and relative OIDs are
		534	basically OIDs without this hack. The practical difference is that the
		535	second component of an OID can only have the values 1..40, while relative
		536	OIDs do not have this restriction.
		537
		538	=item C<BER_TYPE_NULL>
		539
		540	Decodes an C<ASN_NULL> value into C<undef>, and always encodes a
		541	C<ASN_NULL> type, regardless of the perl value.
		542
		543	=item C<BER_TYPE_BOOL>
		544
		545	Decodes an C<ASN_BOOLEAN> value into C<0> or C<1>, and encodes a perl
		546	boolean value into an C<ASN_BOOLEAN>.
		547
		548	=item C<BER_TYPE_REAL>
		549
		550	Decodes/encodes a BER real value. NOT IMPLEMENTED.
		551
		552	=item C<BER_TYPE_IPADDRESS>
		553
		554	Decodes/encodes a four byte string into an IPv4 dotted-quad address string
		555	in Perl. Given the obsolete nature of this type, this is a low-effort
		556	implementation that simply uses C<sprintf> and C<sscanf>-style conversion,
		557	so it won't handle all string forms supported by C<inet_aton> for example.
		558
		559	=item C<BER_TYPE_CROAK>
		560
		561	Always croaks when encountered during encoding or decoding - the
		562	default behaviour when encountering an unknown type is to treat it as
		563	C<BER_TYPE_BYTES>. When you don't want that but instead prefer a hard
		564	error for some types, then C<BER_TYPE_CROAK> is for you.
		565
		566	=back
		567
		568	=cut
		569
		570	our $DEFAULT_PROFILE = new Convert::BER::XS::Profile;
		571	our $SNMP_PROFILE = new Convert::BER::XS::Profile;
		572
		573	# additional SNMP application types
		574	$SNMP_PROFILE->set (ASN_APPLICATION, SNMP_IPADDRESS , BER_TYPE_IPADDRESS);
		575	$SNMP_PROFILE->set (ASN_APPLICATION, SNMP_COUNTER32 , BER_TYPE_INT);
		576	$SNMP_PROFILE->set (ASN_APPLICATION, SNMP_UNSIGNED32, BER_TYPE_INT);
		577	$SNMP_PROFILE->set (ASN_APPLICATION, SNMP_TIMETICKS , BER_TYPE_INT);
		578	$SNMP_PROFILE->set (ASN_APPLICATION, SNMP_OPAQUE , BER_TYPE_IPADDRESS);
		579	$SNMP_PROFILE->set (ASN_APPLICATION, SNMP_COUNTER64 , BER_TYPE_INT);
		580
		581	$DEFAULT_PROFILE->_set_default;
318		582
319	1;	583	1;
320		584
321	=head2 BUGS / SHORTCOMINGs	585	=head2 LIMITATIONS/NOTES
322		586
323	This module does have a number of SNMPisms hardcoded, such as the SNMP	587	This module can only en-/decode 64 bit signed and unsigned integers, and
324	tags for Unsigned32 and so on. More configurability is needed, and, if	588	only when your perl supports those.
325	ever implemented, will come in a form similar to how L<JSON::XS> and	589
326	L<CBOR::XS> respresent things, namely with an object-oriented interface.	590	This module does not generally care about ranges, i.e. it will happily
		591	de-/encode 64 bit integers into an C<ASN_INTEGER32> value, or a negative
		592	number into an C<SNMP_COUNTER64>.
		593
		594	OBJECT IDENTIFIEERs cannot have unlimited length, although the limit is
		595	much larger than e.g. the one imposed by SNMP or other protocols,a nd is
		596	about 4kB.
		597
		598	REAL values are not supported and will currently croak.
		599
		600	This module has undergone little to no testing so far.
		601
		602	=head2 ITHREADS SUPPORT
		603
		604	This module is unlikely to work when the (officially discouraged) ithreads
		605	are in use.
327		606
328	=head1 AUTHOR	607	=head1 AUTHOR
329		608
330	Marc Lehmann <schmorp@schmorp.de>	609	Marc Lehmann <schmorp@schmorp.de>
331	http://software.schmorp.de/pkg/Convert-BER-XS	610	http://software.schmorp.de/pkg/Convert-BER-XS

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Comparing Convert-BER-XS/XS.pm (file contents): Revision 1.9 by root, Fri Apr 19 20:43:12 2019 UTC vs. Revision 1.23 by root, Sat Apr 20 14:53:29 2019 UTC

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Comparing Convert-BER-XS/XS.pm (file contents):
Revision 1.9 by root, Fri Apr 19 20:43:12 2019 UTC vs.
Revision 1.23 by root, Sat Apr 20 14:53:29 2019 UTC